Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 11 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/22/2020   22:29:02   (  -0.01,-137.22) (   0.75,-133.85)  383.52                80
 11/24/2020   10:47:51   (   0.00,-137.24) (   0.41,-139.04)  205.48                80
 11/25/2020   10:31:35   (   0.01,-137.24) (  -0.63,-134.46)  317.68                80
 11/26/2020   22:50:32   (  -0.00,-137.24) (  -0.54,-139.68)  277.71                80
 11/27/2020   22:34:16   (  -0.01,-137.24) (   0.50,-135.10)  245.13                80
 11/29/2020   10:53:05   (   0.00,-137.25) (   0.67,-140.29)  345.00                80
 11/30/2020   10:36:47   (   0.01,-137.25) (  -0.32,-135.69)  177.31                80
 12/01/2020   22:55:45   (  -0.01,-137.24) (  -0.85,-140.91)  419.48                80
 12/02/2020   22:39:28   (  -0.01,-137.23) (   0.20,-136.33)  102.25                80
 12/04/2020   10:58:17   (   0.01,-137.23) (   0.97,-141.52)  489.53                80
 12/05/2020   10:42:01   (   0.01,-137.21) (  -0.07,-136.94)   31.72                80